Coach Jim Caldwell announced Tuesday that left tackle Taylor Decker underwent shoulder surgery Monday after suffering an injury last week during non-padded organized team activities.

Caldwell did not give a timetable for Decker's return. The coach said he would update the second-year player's status at the start of training camp. Caldwell added he doesn't think the surgery should cost Decker his entire 2017 season.

It's a blow for Decker, who is coming off a promising rookie campaign. Decker anchored Matthew Stafford's blindside last season, allowing 4.5 of 37 team sacks allowed. The Lions expected the left tackle to further improve in Year Two, solidifying a line that added highly paid right tackle Ricky Wagner and guard T.J. Lang.